$ git clone -n https://src.fedoraproject.org/rpms/gawk-select.git /var/lib/mock/f45-build-9634-407/root/chroot_tmpdir/scmroot/gawk-select
Cloning into '/var/lib/mock/f45-build-9634-407/root/chroot_tmpdir/scmroot/gawk-select'...
$ git fetch origin b5159ebe333b2363224b51a1e7df92844f98887a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gawk-select
 * [new ref]         b5159ebe333b2363224b51a1e7df92844f98887a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b5159eb Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild