$ git clone -n https://src.fedoraproject.org/rpms/ghemical.git /var/lib/mock/f39-build-1630481-39626/root/chroot_tmpdir/scmroot/ghemical
Cloning into '/var/lib/mock/f39-build-1630481-39626/root/chroot_tmpdir/scmroot/ghemical'...
$ git fetch origin 295a36f61f4372c4cddfe8eed6a7793c2e650bd6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghemical
 * [new ref]         295a36f61f4372c4cddfe8eed6a7793c2e650bd6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 295a36f Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild