$ git clone -n https://src.fedoraproject.org/rpms/tvlsim.git /var/lib/mock/f45-build-37532-715/root/chroot_tmpdir/scmroot/tvlsim
Cloning into '/var/lib/mock/f45-build-37532-715/root/chroot_tmpdir/scmroot/tvlsim'...
$ git fetch origin 6e977b0be7bd469d83ca9b7e2d8a62d1899f11a4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tvlsim
 * [new ref]         6e977b0be7bd469d83ca9b7e2d8a62d1899f11a4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6e977b0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild