$ git clone -n https://src.fedoraproject.org/rpms/rust-cursive_core.git /var/lib/mock/f45-build-41105-779/root/chroot_tmpdir/scmroot/rust-cursive_core
Cloning into '/var/lib/mock/f45-build-41105-779/root/chroot_tmpdir/scmroot/rust-cursive_core'...
$ git fetch origin 31214ea2e9add8e6c617fc6d27146d2068882f59:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cursive_core
 * [new ref]         31214ea2e9add8e6c617fc6d27146d2068882f59 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 31214ea Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild