$ git clone -n https://src.fedoraproject.org/rpms/gawk-xml.git /var/lib/mock/f45-build-9658-407/root/chroot_tmpdir/scmroot/gawk-xml
Cloning into '/var/lib/mock/f45-build-9658-407/root/chroot_tmpdir/scmroot/gawk-xml'...
$ git fetch origin 4a6d38b83d451d3697b8956681653cc8f944d4de:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gawk-xml
 * [new ref]         4a6d38b83d451d3697b8956681653cc8f944d4de -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4a6d38b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild