$ git clone -n https://src.fedoraproject.org/rpms/rust-nom.git /var/lib/mock/f45-build-43372-802/root/chroot_tmpdir/scmroot/rust-nom
Cloning into '/var/lib/mock/f45-build-43372-802/root/chroot_tmpdir/scmroot/rust-nom'...
$ git fetch origin e72c1046564e966de040e670ea1c77dc63863a46:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nom
 * [new ref]         e72c1046564e966de040e670ea1c77dc63863a46 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e72c104 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild