$ git clone -n https://src.fedoraproject.org/rpms/rust-signal-hook.git /var/lib/mock/f45-build-44967-820/root/chroot_tmpdir/scmroot/rust-signal-hook
Cloning into '/var/lib/mock/f45-build-44967-820/root/chroot_tmpdir/scmroot/rust-signal-hook'...
$ git fetch origin 934406c1f49db8eaf77828acaf979603196a3e11:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-signal-hook
 * [new ref]         934406c1f49db8eaf77828acaf979603196a3e11 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 934406c Update to version 0.4.4; Fixes RHBZ#2455050