$ git clone -n https://src.fedoraproject.org/rpms/mawk.git /var/lib/mock/f45-build-18148-510/root/chroot_tmpdir/scmroot/mawk
Cloning into '/var/lib/mock/f45-build-18148-510/root/chroot_tmpdir/scmroot/mawk'...
$ git fetch origin 902e3a977818aa4cfb363897a0fcd5deef697809:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mawk
 * [new ref]         902e3a977818aa4cfb363897a0fcd5deef697809 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 902e3a9 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild