$ git clone -n https://src.fedoraproject.org/rpms/perl-Tk-Stderr.git /var/lib/mock/f39-build-1439802-32286/root/chroot_tmpdir/scmroot/perl-Tk-Stderr
Cloning into '/var/lib/mock/f39-build-1439802-32286/root/chroot_tmpdir/scmroot/perl-Tk-Stderr'...
$ git fetch origin ef78741f51c923e0d709c56b3017e15806d0fed0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Tk-Stderr
 * [new ref]         ef78741f51c923e0d709c56b3017e15806d0fed0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ef78741 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild