$ git clone -n https://src.fedoraproject.org/rpms/libfixposix.git /var/lib/mock/f39-build-1457440-32989/root/chroot_tmpdir/scmroot/libfixposix
Cloning into '/var/lib/mock/f39-build-1457440-32989/root/chroot_tmpdir/scmroot/libfixposix'...
$ git fetch origin 77f167ae80232c6709ec7793ea1f15fa26f2c81c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libfixposix
 * [new ref]         77f167ae80232c6709ec7793ea1f15fa26f2c81c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 77f167a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild