$ git clone -n https://src.fedoraproject.org/rpms/gcovr.git /var/lib/mock/f45-build-9730-408/root/chroot_tmpdir/scmroot/gcovr
Cloning into '/var/lib/mock/f45-build-9730-408/root/chroot_tmpdir/scmroot/gcovr'...
$ git fetch origin f9ab4eeb20c420d523406c91d99bde2c8956591f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gcovr
 * [new ref]         f9ab4eeb20c420d523406c91d99bde2c8956591f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f9ab4ee Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild