$ git clone -n https://src.fedoraproject.org/rpms/mkosi.git /var/lib/mock/f45-build-18948-538/root/chroot_tmpdir/scmroot/mkosi
Cloning into '/var/lib/mock/f45-build-18948-538/root/chroot_tmpdir/scmroot/mkosi'...
$ git fetch origin 3fb3e706ab7e8338b8f1d5c63caedfcd9e906856:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mkosi
 * [new ref]         3fb3e706ab7e8338b8f1d5c63caedfcd9e906856 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3fb3e70 Rebuilt for https://fedoraproject.org/wiki/Fedora_44_Mass_Rebuild