$ git clone -n https://src.fedoraproject.org/rpms/perl-Data-Stag.git /var/lib/mock/f40-build-2622578-64891/root/chroot_tmpdir/scmroot/perl-Data-Stag
Cloning into '/var/lib/mock/f40-build-2622578-64891/root/chroot_tmpdir/scmroot/perl-Data-Stag'...
$ git fetch origin b77652cfec554020b42d89c8d8fc7ff3d8eb0a63:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Data-Stag
 * [new ref]         b77652cfec554020b42d89c8d8fc7ff3d8eb0a63 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b77652c Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild