$ git clone -n https://src.fedoraproject.org/rpms/unicorn.git /var/lib/mock/f40-build-804475-144537/root/chroot_tmpdir/scmroot/unicorn
Cloning into '/var/lib/mock/f40-build-804475-144537/root/chroot_tmpdir/scmroot/unicorn'...
$ git fetch origin 919d981f58670e11b387e50b7a29bf3eba78f1bb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/unicorn
 * [new ref]         919d981f58670e11b387e50b7a29bf3eba78f1bb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 919d981 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild