$ git clone -n https://src.fedoraproject.org/rpms/rust-gix-hashtable.git /var/lib/mock/f45-build-41950-787/root/chroot_tmpdir/scmroot/rust-gix-hashtable
Cloning into '/var/lib/mock/f45-build-41950-787/root/chroot_tmpdir/scmroot/rust-gix-hashtable'...
$ git fetch origin b15aba0e16f256a843cc0be32f22151aaf87c14f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gix-hashtable
 * [new ref]         b15aba0e16f256a843cc0be32f22151aaf87c14f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b15aba0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild