$ git clone -n https://src.fedoraproject.org/rpms/ghc-hourglass.git /var/lib/mock/f45-build-10381-416/root/chroot_tmpdir/scmroot/ghc-hourglass
Cloning into '/var/lib/mock/f45-build-10381-416/root/chroot_tmpdir/scmroot/ghc-hourglass'...
$ git fetch origin ec3130357a7bb9ac87c364e0b3604301c12e291b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-hourglass
 * [new ref]         ec3130357a7bb9ac87c364e0b3604301c12e291b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ec31303 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild