In GitLab before 13.0.12, 13.1.6 and 13.2.3 using a branch with a hexadecimal name could override an existing hash.
{
"versions": [
{
"introduced": "1.0.0"
},
{
"fixed": "13.0.12"
},
{
"introduced": "13.1.0"
},
{
"fixed": "13.1.6"
},
{
"introduced": "13.2.0"
},
{
"fixed": "13.2.3"
}
]
}