$ git clone -n https://src.fedoraproject.org/rpms/email2trac.git /var/lib/mock/f45-build-8143-377/root/chroot_tmpdir/scmroot/email2trac
Cloning into '/var/lib/mock/f45-build-8143-377/root/chroot_tmpdir/scmroot/email2trac'...
$ git fetch origin 8679f211820ffe38d1e8c7a158e844565de8f1af:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/email2trac
 * [new ref]         8679f211820ffe38d1e8c7a158e844565de8f1af -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8679f21 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild