$ git clone -n https://src.fedoraproject.org/rpms/mingw-libgpg-error.git /var/lib/mock/f45-build-18560-521/root/chroot_tmpdir/scmroot/mingw-libgpg-error
Cloning into '/var/lib/mock/f45-build-18560-521/root/chroot_tmpdir/scmroot/mingw-libgpg-error'...
$ git fetch origin aff735670b483b9883ddfecbe8e52762f74b2a18:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mingw-libgpg-error
 * [new ref]         aff735670b483b9883ddfecbe8e52762f74b2a18 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aff7356 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild