$ git clone -n https://src.fedoraproject.org/rpms/rust-ecdsa.git /var/lib/mock/f38-build-side-42-init-devel-1151552-30492/root/chroot_tmpdir/scmroot/rust-ecdsa
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1151552-30492/root/chroot_tmpdir/scmroot/rust-ecdsa'...
$ git fetch origin 796e70bdebf9e72fe628c8720fb825bb01c3337b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ecdsa
 * [new ref]         796e70bdebf9e72fe628c8720fb825bb01c3337b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 796e70b Update to version 0.16.8; Fixes RHBZ#2224463