$ git clone -n https://src.fedoraproject.org/rpms/exif.git /var/lib/mock/f45-build-8544-390/root/chroot_tmpdir/scmroot/exif
Cloning into '/var/lib/mock/f45-build-8544-390/root/chroot_tmpdir/scmroot/exif'...
$ git fetch origin 8fa1979461e0d2769aa244cd44b452b9ede3c1d2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/exif
 * [new ref]         8fa1979461e0d2769aa244cd44b452b9ede3c1d2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8fa1979 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild